A collection of essays by leading scholars of Aristotle which illuminate key ideas at the heart of his philosophy.Explores major themes in Aristotle's metaphysics, his natural science and biology, and his methodology, informed by the belief that all aspects of Aristotle's work need to be studied together if any one of the areas of his thought is to be fully understood.Explores major themes in Aristotle's metaphysics, his natural science and biology, and his methodology, informed by the belief that all aspects of Aristotle's work need to be studied together if any one of the areas of his thought is to be fully understood.This volume of essays explores major connected themes in Aristotle's metaphysics, philosophy of nature, and ethics, especially themes related to essence, definition, teleology, activity, potentiality, and the highest good. The volume is united by the belief that all aspects of Aristotle's work need to be studied together if any one of the areas of thought is to be fully understood. Many of the papers were contributions to a conference at the University of Pittsburgh entitled Being, Nature, and Life in Aristotle', to honor Professor Allan Gotthelf's many contributions to the field of ancient philosophy; a few are contributions from those who were invited but could not attend. The contributors, all longstanding friends of Professor Gotthelf, are among the most accomplished scholars in the field of ancient philosophy today.Introduction; 1. Teleology, Platonic and Aristotelian David Sedley; 2. Biology and metaphysics in Aristotle Robert Bolton; 3. The unity and purpose of On the Parts of Animals I James G. Lennox; 4. An Aristotelian puzzle about definition: Metaphysics Z.12 Alan Code; 5. Unity of definition in Metaphysics H.6 and Z.12 Mary Louise Gill; 6. Definition in Aristotle's Posterior Analytics Pierre Pellegrin; 7. Male and female in Aristotle's Generation of Animals Aryeh Kosman; 8. Metaphysics ?. 7 and 8: some issues concerning actuality and potlĮ